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This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 6 April 2010, reviews electromagnetic and optical metamaterials for aerospace use. It was produced in FY 2009 under the Advanced Aerospace Weapon System Applications (AAWSA) Program. The report covers super-lenses and hyper-lenses for imaging objects smaller than the diffraction limit, slowing light to shrink components, energy-harvesting absorbers, and one-way chiral devices. It concludes that metamaterials matter for aerospace because they allow smaller, lighter components.
“The Advance”11 pages
ti Amnilt,dn \ ;·C'.;, "ic.t-•,~ Neer fleltl UNCLASSIFIED 1 (FOR OFFJCJt! 1155 Qt!! Y/Ii Figure 9. FSL Based on an Indefinite Permittivity Metamaterial Placed Between the Object and the Image-Releasing Grating. The grating releases into the far field sub-diffraction waves produced by light scattering off the object. The role of the metamaterfal fs to propagate sub-diffraction waves from object to grating. (Reference 27) Ever since Merlin's invention (Reference 28) of the sub-diffraction near-field plate, it has become clear that the interference between sub-diffraction electromagnetic fields can result in the formation of a deeply sub-wavelength image. The near-field plate, however, is not an imaging device; its purpose is to create a well-defined image using an elaborate pre-fabricated sub-wavelength structure on the plate's surface. The goal for this study is to observe an a priori unknown sub-wavelength image using a near- field structure. In the past, successes (Reference 19) in retrieving images of sub- wavelength objects (such as A/20 holes) using an NSOM for radiation detection are achieved. An NSOM is a near-field instrument, therefore, a much more desirable detection method would involve far-field detection. To advance this goal, and to develop a tool sometimes referred to as the FSL, we've initiated research on multi- beam multi-detector sub-wavelength holography illustrated in Figure 10. ~ Detectors ~ &"#/lk,-%;k,-~, Farfi:ld BeamA/// ~~eamB 4'1t1D k Figure 10. Tomographic Multi-Beam Multi-Detector Holography of Sub-Wavelength Objects Using . Indefinite Permittivity Medium (IPM), Incident beam(s) scatter off the sub-,!., object, propagate through the IPM, and then get re-scattered into the far field by the grating with the period D. The purpose of the multi-detector arrangement is to disentangle the ki and k~ spatial wave numbers in the object's spectrum (shown In the left panel). Beams A and Bare phase-shifted with respect to each other. 12 UNCLASSIFIED/ /EAR QffJCJAf 11$f QNJ X
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 27 pages are in the text index: search them above, or from the library's search.